 Just as we suffer from excess in all things, so we suffer from excess in literature; thus we learn our lessons, not for life, but for the lecture room.Letter CVI: On the corporeality of virtue, line 12

 Reason, in fact, is a thing of God, inasmuch as there is nothing which God the Maker of all has not provided, disposed, ordained by reason — nothing which He has not willed should be handled and understood by reason. All, therefore, who are ignorant of God, must necessarily be ignorant also of a thing which is His, because no treasure-house at all is accessible to strangers. And thus, voyaging all the universal course of life without the rudder of reason, they know not how to shun the hurricane which is impending over the world.De Paenitentia (On Repentance), 1.2-3